you're the first stranger of male or Whatever you're in world of Filled all in girls with different species you're the first boy in this world but you heard them incoming as they explore around but welcome to the Anime world of all in girls! I hopefully you're enjoying this one!

Update added factions:

Fangbones (Female Militia Organization from fictional country Kyukoto since 1997)-

JSDF (Japanese Self-Defense Forces/Modern Military from Japan)-

United Soviet Socialist (A 1994s Era WW2 Military from Russia)-

Chinese-Japanese Communist Party (An organizational from China since 1995)-

Kingdom of Kaiser (An Medieval Times from between any Modern worlds, their technology is like 12th centuries inspired by the ancient times)-